1972

6.5

1971

4.5

1997

5.2

2014

3.5

2021

6.6

2022

6.6

2017

1.7

1989

7.2

1960

7.5

2005

7.7

1994

8.7

1995

7.0

2007

6.7

1960

6.4

2003

6.5

1994

5.9

1984

8.4

2004

4.6

1965

6.3

1993

7.5